of cleveland



D. A. CLARK AND c. E. LOWE.

TIRE CORE. APPLICATIbN FILED AUG-I IQIB.

Patented May 13, 1919,.

irsirs s'rA'rEs PATENT orrron.

310. 11 A. CLARKAND CLYDE E. LOWE, OF CLEVELAND, OHIO, ASSIGNORS TO THECLYDE E. LGWE GOMPANY, F CLEVELAND, OHIO, CORPORATION OF OHIO.

TIRE-CORE.

Specification of Letters Patent. Patented HIay 13, 1919.

Application filed August 7, 1918. s erial No. 248,677.

To all whom it may concern:

7 Be it known that we, Don A. CLARK and CLYDE lfi. Lows, citizens of theUnited States,

residing; at Cleveland, in the county of Cuya-.

huge. and State of @hio, have invented a certain new and usefulImprovement in Tireof which the following is a full, clear, cractdescription, reference being had to the accompanying drawings. to Thisinvention relates to cores for use in the manufacture of pneumatic tiresand has especial reference to sheet metal cores of the general typedescribed in and claimed in our Patent No. 1,273,032 granted July 16, is1918, and consisting essentially of a plurality of arcuate, hollow,sheet metal sections secured around the periphery of a rigid metal ring.res objects of the present invention are the provision" of new andsimplified as means for securing the sheet metal bodies to said ring;for preventin the ingress of steam, water, or other obJectionable fluidsthe interiorof the core; for securing tothe varioussections of the corein 9 me be of the collapsible type; for and strengthening the core;while objects and advantages of our inziil become apparent as thedescripi n the drawings accompanying and forma part of this applicationwe have shown W of the many mechanical construction hich our inventiveidea can be embodied,

not intended. to limit us to the constructions therein set forth. Inthis drawing, l igure 1 is a plan View of part of a collapsible tirecore constructed in accordance with our invention; Fig. 2 is a crosssectional View of the core shown in Fig. 1'; Fig. 3 is a cross sectionalview of a modified form of attachin t shown in connection with the basering of an integral core; Figs. e, 5, and 6 illustrate modified, modesof attaching the sheet 4& metal walls in connection with a differenttype of mounting sometimes employed with *tional cores: and Fig. is aplan view of of the core shown in Fig. 6. L 1e essence of the present,invention consists in. this, that the sheet metal bodies are -l-' med attheir inner parts withspaced integral flanges between which 1s inserteda flat sided supporting ring, said flanges 'being clam ed thereto byfastening members arranged perpendicular to the planeof said "11 thisdrawing is illustrative only andsaid bodies is formed at the portion ofsmallest diameter with a pair of spaced inwardly projecting flanges22,which are. preferably substantially parallel. These bodies are ofarcuate shape and are assembled together end to end forming a completeucircle, the various sections being preferably not less than in extentnor greater than 180. The ends of these sections are joined together inany suitable manner as by bracing sleeves (shown in dotted lines in Fig.

1) and their joints are shown at 33 in Fig. -1.

Inthe construction shown in Figs. 1 and 30 2, these sections areassembled around a rigid supporting ring 4, said ring having afiat-sided peripheral portion 5 introduced be tween the flanges 2-2, andhaving at each side an inclined face 6 bounding said flatsided portion.The portion 5 is formed at spaced intervals with transverse threadedapertures 7, 7 in which are received the fiatheaded screws 88,countersunk into the flanges 2-2 and serving to grip the parts together.The margins" of the flanges 22 are formed with laterally turned lips 99which lie against the face 6-6. The ring is also shown as formed withgrooves 10-10 receiving packing material by means of which the ingressof fluid is prevented.

The core body 1 and ring 4: are severed at certain points by transversesc arfs 12-12 arranged ,at oblique angles to the radius so as to permitcertain sections of the core to be removed and the remainder of the sameto be collapsed; and in order to secure said sec tions rigidlytogetherwe have shown a pair of rigid rings 13-13, each having upon one1 side an annular groove 14, oneface of which,

side of the ring l. The rings 13-13 being drawn toward each other by anysuitable in Fig. 4, the ring 4* means such as bolts or clamps (notshown) it will be clear that the core sections will be held rigidlytogether; and in the present instance we have shown the wall 15 asoverlying the lips 9-9 of the sheet metal body whereby the same are heldin place with added firmness. The inner periphery of the ring 4 is shownas formed with a groove or recess 18 adapted for the reception of theclutch or mandrel on which the core is mounted for operation.

In the modified construction shown in Fig. 3, the ring 4 is made in asingle piece, thus producing an integral or non-collapsible core such asis frequently used for smallsized tires 01' soft-bead tires. This ring,like the preceding is formed with a peripheral rectangular portion 5introduced between the flanges 2-2, and with a wall 6 at the base ofsuch flat-sided part. Each side wall of the body 1 is formed at a pointoutside the flange 2 with an inward offset 20, while the inner margin ofeach flange 2 is formed with a laterally turned lip 9 adapted to engagethe Wall 6*. Between each lip 9" and the corresponding offset 20 thereis interposed a sheet metal ring 21, .whose inner part is flat to engagethe corresponding flange 2, and whose outer part is flared to correspondwith the slope of the core wall. The thickness of this ring is the sameas that of the oflset 20, thereby forming a smoothsidedcore. This ringand the flange therebeneath is traversed by a pluralityof spacedapertures receiving suitable fastening means such as the transverserivets 22 whereby the parts are held together. The advantage of thisconstruction is that the ring 21 distributes the pressure of the rivets,and also forms a support or anvil for the operation of the cutting knifewhich is ordinarily applied in the angle between the flange andcore-wall. The sides of the portion 5 are shown as grooved at l010 forthe reception of the packing material.

Referring now to the construction shown and is formed at its innen partwith a laterally facing annular groove, 25, receiving the annular rib26, of a continuous base ring 27 by means of which the segments aresecured together. The ring 27 is formed with a flange portion 28overlying the interior of the ring 4* and formed with a groove or recess18 for, the reception of the clutch or mandrel. The rib 26 is providedwith spaced lateral bolts 29 adapted to enter suitable apertures in thebase of the groove 26 and to be held therein by nuts 30.

The peripheral, portion of the ring 4 is formed with a flat-sided part Idefined by the walls or shoulders 6 In the present instance these wallsor shoulders lie inside of the plane of the ring sides, forming grooves,Whereas in the former embodiments they lay is of the segmental type.

outside, forming ribs; and the n'largins of the flanges 2 2 beinglaterally turned to form lips engaging lhcsc shoulders are in thepresent instance turned inwardly as at 9 where previously they wereturned outwardly. Suitable securing devices 8" traverse the ringportions 5" and engage the flanges 22, these devices in the presentembodiment being represented by a rivet having flattened heads engagingcountersunk recesses in the flanges 2, 2.

. In the embodiment shown in ,Fig. 5 the ring and its adjunctsare thesame as in Fig. 4 excepting that the side walls of the portions, 5,instead of being entirely smooth, are countersunk at intervals as shownat 32, and the flanges 22 are embossed inwardly to lit these countersunkportions. This cmhossing forms upon the exterior of each flange theequivalent of a countersunk hole for receiving the hcads 33 of the,l'astcnings, here shown as screws threaded into the ring. The advantageof this over that shown in Fig. 4: is that it provides a larger surfaceof contact between the iastcnings and flanges.

In the cmbodimcnt shown in Fig. (3 the ring and its adjuncts are thesame as those shown in Figs. l and 5 except that the sidcs of theportions 5 are formed with annular grooves 35 and the flanges 2-2 arcembossed inwardly to form annular cmlmsscd ribs I'll; complementary tothese rooves.

In the outer side of the channels dclincd by this ei'nbossing arelocated the washers :ET traversed by the fastcncrs 38 which may beeither rivets or screws.

In the embodiments shown in Figs. -l, 5, and 6 the walls of the rings tand 27 are preferably made flush with the exterior surfaces of theflanges 2-2; and the grooves receiving the lips 9 are preferably sweatedfull of a fusible metal such as soft solder in order to inhibit theentrance of fluids. It will he understood that in the practical use ofthe devices, either in the wrapping of the fabrics thereon or in thecuring process in the mold, the operating pressure is inward, thusbringing a minimum of strain upon the fastenings and tending to forcethe flanges into tighter contact with the ring (whether or notadditional mcking be employed) thus again tending to inhibit leakage. Itwill he understood that numerous changes in construction could be madewithout departing from our inventive idea, and all such variations wedesire to protect and secure in these Letters Patent.

Having thus described our we claim is 1. A tire core comprising, incombination, a plurality of hollow arcuate sheet metal bodies arrangedaround a rigid metal ring.

invention, what each body having a pair of inwardly projecting spacedflanges and said ring having a peripheral portion projecting betweensaid flanges, and means including laterally extending holding devicesfor clamping said flanges laterally against said ring. a

2. In a tire core, a hollow arcuate sheet metal body having a pair ofinwardly projecting spaced flanges, a ring having a portion locatedbetween said flanges, and means including headed fasteners for clampingsaid flanges against said ring, said fasteners being arranged with theirlength transverse to the plane of said ring. i

3. In a tire core, a hollow arcuate sheet metal body having a pair ofinwardly projecting spaced flanges, a ring having aportion locatedbetween said flanges, and headed securing devices traversing saidflanges and ailixed to said ring, the heads of said devices overlyingsaid flanges.

4. In a tire core, a hollow arcuate sheet metal body having a pair ofinwardly pro jecting spaced flanges, a ring having a portion locatedbetween said flanges, means for securing said flanges to said ring, andmeans preventing ingress of fluid between said flanges and ring,

5. In a tire core, a hollow arcuate sheet" metal body having a pair ofinwardly projeeting spaced flanges, a ring having a portion locatedbetween said flanges, thesides of said ring being grooved, sealingmaterial 111 sald grooves, and means clampingsaid flanges against saidring.

6. In a tire core, a hollow arcuatesheet metal body having a pair ofinwardly pro- Jectmg spaced flanges, a ring having a perlpheral portionlocated between said flanges and having at each side a shoulder adjacentto'said peripheral portion, said flanges haw ing laterally turned lipsadapted to rest v against said shoulders, and means for. clamping thecorresponding lip, said ring'being grooved for the reception of sealingmaterial, and means ior clamping said flanges to said ring.

8. In a tire core, a hollow arcuate sheet metal body having a pair ofinwardly spaced flanges-whose margins are formed with outwardly turnedlips, a ring having a peripheral portion located between said flangesand a shoulder at each side engaging the corre sponding lip, a clampingring at each side of said first ring engaging the face of thecorresponding lip opposite to its shoulder, and means for drawing saidlast rings together. f p

In testimony whereof, we hereunto aflia our signatures.

now a. omen, earns a. LUWE.

